4B28

Crystal structure of DMSP lyase RdDddP from Roseobacter denitrificans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Structure of Rddddp from Roseobacter Denitrificans Reveals that Dmsp Lyases in the Dddp-Family are Metalloenzymes.

Hehemann, J.H.Law, A.Redecke, L.Boraston, A.B.

(2014) Plos One 9: 03128

  • DOI: 10.1371/journal.pone.0103128

  • PubMed Abstract: 
  • Marine microbes degrade dimethylsulfoniopropionate (DMSP), which is produced in large quantities by marine algae and plants, with DMSP lyases into acrylate and the gas dimethyl sulfide (DMS). Approximately 10% of the DMS vents from the sea into the a ...

    Marine microbes degrade dimethylsulfoniopropionate (DMSP), which is produced in large quantities by marine algae and plants, with DMSP lyases into acrylate and the gas dimethyl sulfide (DMS). Approximately 10% of the DMS vents from the sea into the atmosphere and this emission returns sulfur, which arrives in the sea through rivers and runoff, back to terrestrial systems via clouds and rain. Despite their key role in this sulfur cycle DMSP lyases are poorly understood at the molecular level. Here we report the first X-ray crystal structure of the putative DMSP lyase RdDddP from Roseobacter denitrificans, which belongs to the abundant DddP family. This structure, determined to 2.15 Å resolution, shows that RdDddP is a homodimeric metalloprotein with a binuclear center of two metal ions located 2.7 Å apart in the active site of the enzyme. Consistent with the crystallographic data, inductively coupled plasma mass spectrometry (ICP-MS) and total reflection X-ray fluorescence (TRXF) revealed the bound metal species to be primarily iron. A 3D structure guided analysis of environmental DddP lyase sequences elucidated the critical residues for metal binding are invariant, suggesting all proteins in the DddP family are metalloenzymes.


    Organizational Affiliation

    Department of Biochemistry & Microbiology, University of Victoria, Victoria, British Columbia, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
METALLOPEPTIDASE, FAMILY M24, PUTATIVE
A
470Roseobacter denitrificans (strain ATCC 33942 / OCh 114)Mutation(s): 0 
Gene Names: dddP
EC: 4.4.1.3
Find proteins for Q166H0 (Roseobacter denitrificans (strain ATCC 33942 / OCh 114))
Go to UniProtKB:  Q166H0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FE
Query on FE

Download SDF File 
Download CCD File 
A
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.206 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 116.850α = 90.00
b = 116.850β = 90.00
c = 133.430γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-25
    Type: Initial release
  • Version 1.1: 2014-08-06
    Type: Database references